Question

Раскройте скобки:
(2x-4)²

Answer 1

(2x-4)²
$(2x) ^{2} - 2 \times 2x \times 4 + 4 ^{2} \\ \\ 4x ^{2} - 16x + 16$

Answer 2

$(2x-4)^{2}=4x^{2}-8x-8x+16=4x^{2}-16x+16$